Re: Drawing bit mapped image in drawing area
On Fri, Mar 28, 2014 at 1:10 AM, Ken Bass daytoo...@gmail.com wrote: The image is a captured video frame that can be in one of several formats (eg, yuv420, rgb8/24/32, jpeg/mjpeg). That is, I can provide it in any of those formats. It is in memory - not a file. And it would need be updated periodically, and quickly. I also want to be able to draw on, or add text to, it. I know how I'd do that in Pike with a GTK2.DrawingArea, but it's most likely you're not using Pike. What language are you using, and how is the image stored in memory? ChrisA ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Re: Drawing bit mapped image in drawing area
On 27 March 2014 14:10, Ken Bass daytoo...@gmail.com wrote: I have a bit mapped image (really a video frame) that I want to display. I am guessing that putting it into a user drawing box would be the way to go. If there is a better way, please point me in that direction. I have a tiny program which displays a live video image with an overlay. It's in Python for gtk2, but gtk3 is (almost) the same, except for the drawing model for the overlay. It runs at about 50fps with not too much CPU load on my laptop. https://github.com/jcupitt/rtiacquire/blob/master/rtiacquire/preview.py The overlay is a crop box you can drag about and resize. Use GtkImage to display the image data. When a new frame comes in, decode to a RGB buffer, wrap it up as a GdkPixbuf, and set that pixbuf as the data for the GtkImage. https://developer.gnome.org/gdk-pixbuf/stable/gdk-pixbuf-Image-Data-in-Memory.html#gdk-pixbuf-new-from-data https://developer.gnome.org/gtk3/stable/GtkImage.html#gtk-image-set-from-pixbuf To draw the overlay, attach to expose-event with connect_after and just draw. Your code will run after the GtkImage has painted the image background, so draw anything you like and it'll float on top of the image. John ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
Drawing bit mapped image in drawing area
I have a bit mapped image (really a video frame) that I want to display. I am guessing that putting it into a user drawing box would be the way to go. If there is a better way, please point me in that direction. More detail: The image is a captured video frame that can be in one of several formats (eg, yuv420, rgb8/24/32, jpeg/mjpeg). That is, I can provide it in any of those formats. It is in memory - not a file. And it would need be updated periodically, and quickly. I also want to be able to draw on, or add text to, it. I know how to draw on this area, and write text. But I couldn't find any references to blitting the image into the box. In particular, what pixel format would be needed by the drawing area, or if that format could be set somehow. TIA ken ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
concurrent GList
Hi, is there a concurrent GList around? It should use of atomic operations. My project probably has need for it. Due to concurrency problems. I believe I get those errors cause of unfinished operations. Since I'm working on performance. Please visit my project: http://sf.net/p/ags regards Joël ___ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
